Pete Sessions

Texas Democrats emboldened by congressional upsets

Texas Democrats emboldened by congressional upsets

In a sign of changing demographics in historically red Texas, Democrats there unseated two prominent Republicans on Tuesday in marquee contests for seats in Congress.

Lizzie Pannill Fletcher, a corporate lawyer, defeated longtime Rep. John Culberson in Houston by 5 percentage points. And Colin Allred, a lawyer and former professional football player who had served in the Obama administration, beat Rep. Pete Sessions in Dallas by 6 percentage points.

“This could very well be the beginning of the end of the hegemony the Republicans have enjoyed for the last generation in Texas,” said Jim Henson, who directs the Texas Politics Project at the University of Texas at...